PC/ABS

Thermoplastics > Alloys

PC / ABS -polycarbonate / Acrylonitrile Butadiene Styrene, alloy
The PC / ABS (polycarbonate / acrylonitrile butadiene styrene) is a mechanical mixture also called alloy, alloy or blend, between PC and ABS. This material offers the most desirable properties of the two materials which comprises (PC and ABS). by a unique combination which adds the high processability of ABS with excellent mechanical properties and resistance to impact and heat properties of the PC is obtained. The ratio between polycarbonate and acrylonitrile butadiene styrene mainly affects the heat resistance of the final product. Mixtures of PC / ABS show a synergistic effect resulting in an excellent impact resistance at low temperatures, which is better than the impact strength of ABS or PC separately. PC and ABS resin blends of different alloy brands have large differences in performance. The high rubber content improves the impact resistance of system PC / ABS, but significantly less Cabado mutual capacitance between the phase behavior, tensile properties of the reduced alloy, therefore, the choice of appropriate rubber content ABS not only can make the impact resistance of the mixture to obtain a better and synergistically increased flexural resistance appears when a low rubber content ABS is used, the flexural strength of the alloy is synergistically enhanced. In addition, high acrylonitrile, low and high rubber ABS molecular weight can enhance heat resistance of the alloy.
Symbols			Compuesto
PC/ABS ABS/PC ABS-PC PC-ABS PC número de registro CAS 25971-63-5 ABS número de registro CAS 9003-56-9
Properties PC/ABS
High impact resistance even at low temperatures high strength high stiffness Processability Low total and high dimensional accuracy contraction You can color and print
El papel de los compatibilizadores en las propiedades de la aleación de PC / ABS
Polycarbonate (PC) behaves in a Newtonian manner relatively, but the ABS exhibits significant shear thinning. Mixtures High Percentage of ABS have a similar behavior to that of ABS, while rich blends of polycarbonate (PC), that is, 0% - 15%, exhibit a nearly Newtonian behavior. The dynamic viscosity of not varied respectively proportionally with the composition. Except for the mixture of 15%, viscosities of other mixtures fall in a narrow band indicating a wide window operation with variable mixing ratio. The mixtures have a lower than either of the two pure components viscosity. Young's modulus increases systematically with increasing amounts of polycarbonate. The deflection temperature HDT heat and Vicat softening temperature constantly increasing between 0 and 50 wt% PC, after which the increase in HDT became more pronounced. The optimum amount of rubber in ABS is 30% for many applications because the impact resistance was at its highest point, while resistance performance and the Young's modulus were still sufficient temperature levels. The optimum distribution between PC and ABS in the mixture is between 70 to 90% by weight of PC, depending on the application, as 90% by weight of PC supports higher tensions and efforts. However, 10% of ABS not often improve processability and chemical resistance in the mixture. Mixtures with 70% and 85% content of ABS had a 'higher than the pure ABS, G indicating improved elastic effect. The tensile strength of the mixtures follows the "rule of mixtures" showing a decreasing value with increasing ABS. Elongation at break (%) and the impact strength (kJ / m 2 ) do not obey "rule of mixtures", suggesting that the morphology of the blends also plays an important role in determining the properties. The mixture with 15% ABS has the distinctive morphology and behavior and correspondingly different properties.
Products range PC/ABS
PC / ABS is provided in a wide variety of degree and based on the application, it is desirable to know how sensitive the properties of the mixture to changes in the compositions. For this reason mixtures of ABS and PC virgin virgin prepare five different compositions, namely 15%, 30%, 50%, 70% and 85% by weight of PC and characterized by different rheological and mechanical characteristics. our rangeincludes blend of PC / ABS containing fiberglass, mineral filler, hybrid, with special additives and special lubricant, cromables colored grades, high gloss, high impact, with improved thermal properties, reinforced, flame-retardant, conductors, high density. Since the polycarbonate lends itself to a wide variety of products, properties and regulatory approvals, it can be adapted to meet the needs of specific applications. For example, there are degrees that meet NSF standards for drinking water, biocompatibility according to ISO 10993 and classifications UL 94 flame.
Physical and mechanical properties PC/ABS
Amorphous thermoplastic high impact mixtures of polycarbonate / acrylonitrile butadiene styrene (PC / ABS) combine ease of processing with low temperature ductility. With excellent impact resistance, excellent heat-resistance and outstanding aesthetic resin blends PC / ABS can be tailored to achieve specific properties, to balance performance, cost and processability. Resin blends PC / ABS provide an excellent design solution when what matters is the appearance and durability. ABS / PC, it has excellent tenacity, high HDT and stiffness, viscosity greater than ABS
Thermal properties PC/ABS
Resins PC / ABS fit into applications requiring deformation temperature by high heat (95-125 ° C) and good hardness (Vicat B120 = 120 ° C and 130 ° C). Materials with excellent mechanical properties balance to -40 ° C. They have excellent low temperature toughness, which makes them ideal for products that face a wide range of temperatures.
Electrical Properties PC/ABS
Being a slightly polar material, with a high TG and low water absorption, the electrical properties are hardly affected by the temperature variation, frequency (up to 106 Hz) and humidity within normal working ranges.
Optical Properties PC/ABS
PC / ABS saves on painting costs, while offering a good surface quality and shine in the shade. Prolonged exposure to sunlight produces a frangible thin film, causing a color change and reducing the surface gloss and flexural strength. Pigmentation in black provides greater resistance to weathering
Chemical properties PC/ABS
Generally good but depends on the degree of the resin, chemical concentration, temperature and stress on the parts. They are generally not affected by water, inorganic salts, alkalis and many acids. They are soluble in esters, acetone, aldehydes and some chlorinated hydrocarbons. Not degrade oils are recommended for bearings operating under moderate loads and speeds
Processability
PC / ABS can easily be molded by injection, extrusion or molding or using the rotation system. The high impact are more difficult because having a higher rubber content makes them more viscous. The processing capacity of the PC can be improved with the addition of ABS. The shear thinning effect of rich mixtures ABS provides significant energy savings in the processing of these mixtures. This blend can be reused as a recycled much higher percentage polymers. Its characteristics are similar to those of non - ferrous metals, may be drilled, milling, turning, sawing and stamping.
Compound PC/ABS
PC and ABS blends device selectable double screw extruder. The manufacturing method has a great influence on the morphology of PC / ABS.
Tips and trick
To improve the long term life of the compounds of PC / ABS, in particular when used at high temperature and humidity, it is desirable to improve the hydrolysis resistance of these materials. Adding one special additives ( Contact the service ) considerably increases the hydrolysis resistance without impairing the toughness of the blend.
Applications PC/ABS
Grille, pillars, parts of the dashboard, parts of seats, molding of the center console, door components, small appliances, electric switches, control panels, power units, housing taillight, pillars, parts of the dashboard, coffeemakers. Some examples of applications in the automotive sector are display screens, center consoles, glove compartments and covered, visors, air vents, cupholders, housings taillights, ashtrays, control units and roof belt slots.